97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
/*
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* Copyright (c) 2013 IBM Corp.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* Seth Hoenig
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* Allan Stockdill-Mander
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* Mike Robertson
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*/
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// This demonstrates how to implement your own Store interface and provide
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// it to the go-mqtt client.
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package main
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import (
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"fmt"
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"time"
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MQTT "git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git"
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"git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git/packets"
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)
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// This NoOpStore type implements the go-mqtt/Store interface, which
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// allows it to be used by the go-mqtt client library. However, it is
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// highly recommended that you do not use this NoOpStore in production,
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// because it will NOT provide any sort of guaruntee of message delivery.
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type NoOpStore struct {
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// Contain nothing
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}
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func (store *NoOpStore) Open() {
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// Do nothing
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}
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func (store *NoOpStore) Put(string, packets.ControlPacket) {
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// Do nothing
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}
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func (store *NoOpStore) Get(string) packets.ControlPacket {
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// Do nothing
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return nil
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}
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func (store *NoOpStore) Del(string) {
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// Do nothing
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}
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func (store *NoOpStore) All() []string {
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return nil
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}
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func (store *NoOpStore) Close() {
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// Do Nothing
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}
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func (store *NoOpStore) Reset() {
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// Do Nothing
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}
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func main() {
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myNoOpStore := &NoOpStore{}
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opts := MQTT.NewClientOptions()
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opts.AddBroker("tcp://iot.eclipse.org:1883")
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opts.SetClientID("custom-store")
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opts.SetStore(myNoOpStore)
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var callback MQTT.MessageHandler = func(client *MQTT.Client, msg MQTT.Message) {
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fmt.Printf("TOPIC: %s\n", msg.Topic())
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fmt.Printf("MSG: %s\n", msg.Payload())
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}
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c := MQTT.NewClient(opts)
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if token := c.Connect(); token.Wait() && token.Error() != nil {
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panic(token.Error())
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}
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c.Subscribe("/go-mqtt/sample", 0, callback)
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for i := 0; i < 5; i++ {
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text := fmt.Sprintf("this is msg #%d!", i)
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token := c.Publish("/go-mqtt/sample", 0, false, text)
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token.Wait()
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}
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for i := 1; i < 5; i++ {
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time.Sleep(1 * time.Second)
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}
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c.Disconnect(250)
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}
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